Fig. 6From: A novel comorbidity index in Italy based on diseases detected by the surveillance system PASSI and the Global Burden of Diseases disability weightsDensity plots showing the distribution of the variable age divided by sex for each subpopulation characterized by different educational (low-high) and economic (no economic problems-economic problems) levels for the PASSI sample analyzed (i.e., year 2019 with \(n= 31,746\) respondents). The educational variable takes the value as “low” if the respondent has an educational level below high school and “high” otherwise. The economic variable assumes the level “no economic problem” if the respondent makes ends meet with the financial resources available (from own or family income) very/quite easily and “economic problem” otherwiseBack to article page